Amplifier



Feb, 2 1926. 1,571,414

v. w. JENSEN AMPLIFIER Filed March 3 1924 N [/5 N 7'0 Verna/7 MZJe/m /Y ATTORNEY Patented Feb. 2, 1926.

UNITED STATEn- VERNON W. JENSEN, OF SEATTLE, f/AtfilllfllGTON.

AMPLIFIER.

Application filed March 3, 1924.

To all whom it'ma z concern:

Be it known that l, VERNON WV. JENsnN,

a citizen of the United States, residing at liieattle, in the county of King and State of li ashington, have invented a new and useful Amplifier; and I do hereby declare that ihe following is a full, cl or. and exact specification, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention is a collapsible fibre, bell section. that may be placed at the end of a horn or other device forming the small section of the tone chamber, for the production or reception of sound.

The object of the invention is to provide an amplifier that is collapsible.

Another object of the invention is to provide a collapsible amplifier that will improve rather than destroy or distort the sound waves.

And a further object of the invention is to provide a collapsible bell or amplifier that is of a simple and economical construction and that may readily be set up or taken down.

ll ith these ends in view the invention embodies a section in the form of a frustrum of a cone which is constructed of segments hinged together and provided with a latch, and a horn shaped section over the end of which the former section may be placed.

Other features and advantages of the invention will be seen from the following description taken in connection with the drawings wherein:

Figure 1 is a side view of the amplifier with part broken away.

Figure 9. is an end view ol the bell shaped section.

Figure 3 is a detail showing the latch for holding the sections of the bell shaped section together.

Figure l: is a detail showing the hinge for holding the sections of the bell shaped sec tion together.

Figure 5 is a View showing a horn of an alternate design.

In the drawings I have shown my device as it would appear wherein numeral 1 indicates the bell shaped section which is con structed of three sections 2, 3, and 4. The sections are held together by hinges 5, one member 6 or which is attached to one edge of one of the sections 2, 3 0r 4, and the other member 7 oiwhich is attached to the adja Serial No. 696,434.

cent sect-ion with a spacer 8 between it and section. The edge 9 of the section to which the member 7 of the hinge 5 is attached will project beyond the center of the hinge as shown in Figures 2 and 4: so that the edge o1 the adjoining section which is attached to the opposite member 6 of the hinge will lap over it to form a seal joint. It is understood that any number of the hinges 5 may be used or that one continuous hinge may be used, or that any other means may be used for connecting the segments together.

The two open edges of the segments are held together by a latch 10 as shown in Figure 3. The latch 10 is held to the section 4 by rivets 11 and may be constructed of a flat piece of material with one edge 12 bent upward at right angles. This edge or projection may be placed through an opening 13 in a strip of material ll that is attached to the section 2 by rivets 15 with a spacer 16 between the strip ll and the section This will leave a space 17 between the edge of the section 2 and the strip lel into which the edge of the section 4 may project when the sections are snapped together: Although I have shown alatch of this desi n it is understood that any suitable means may be used for holding the sections together.

When the sections are held together as hereinbefore described they will form a lt'rustruin of a cone as shown and they may be placed over the end of the horn shaped section 18 as shown in Figure 1. It will be seen that the end 19 of the horn shaped section will be provided with a ridge 20 at the ends and another ridge 21 a short distance from the end which will leave a recess 32 around the end oi the section between the ridges 20 and 21. The bell shaped section l may be placed in this recess or groove either by snapping it over the end or by placing the horn shaped section through it.

in Figure l. have shown a horn section of an alternate design in which the large end is bent backward over the small end in order to economize space and the bell section 1 may be placed over the end 24 in the same manner as that shown and described for the end 19 of the section 18. It is also understood that this horn section may be made oi? any other suitable design or size. 1

n the design shown in Figure l I have ;..,.iwn a dotted line 25 across the horn section 18 to indicate that this section may be made in two sections with one telescoping in the other, and it is also understood that this horn section may be made of say number of telescoping sections. In Figure 5 I have shown a dotted line 26 which will indicate that the horn section .8 or the bell section 1 may be made square instead of round as shown, and it is also understood that these sections may be made in any desired shape It is understood that other changes may be made in the construction without departing from the spirit of the invention. One of which changes may be in the material of which the sections are made as it is understood that the hell section 1 in particular may be made 0t any other suitable material instead 0t the fibre as specified; another change may be in the location of the joint between the horn section and. the c-olia tisible section as it is understood that the sections may be connected at any suitable point; and still another change ma be in the means for holding the collapsible section to the horn section as it is understood that these may be connected by any suitable means.

The construction will be readily understood from the foregoing description. To use the device it may be assembled as shown and attached to either a phonograph. or a, 0

Having thus fully described the invention, what I claim as new and desire to cure by Letters Patent, is

In an amplifier, a plurality of sections conforming to the shell of a trustrum ot a cone, said sections being; hinged together at their edges with the edge of one section e:-:tcnding beyond the center of the hinge to form a lap joint and one of said joints having" the hinges omitted and being provided with a snap for holding the sections together.

VERNON W. JENSEN. 

